Predict DestructibleSystem Part 2: First batch of entity effects (#41039)

* first batch

* fix name

* fix

Content.Shared/EntityEffects/EntityEffect.cs

@@ -0,0 +1,62 @@
+using Content.Shared.Database;
+using Content.Shared.EntityConditions;
+using Robust.Shared.Prototypes;
+
+namespace Content.Shared.EntityEffects;
+
+/// <summary>
+/// A basic instantaneous effect which can be applied to an entity via events.
+/// </summary>
+[ImplicitDataDefinitionForInheritors]
+public abstract partial class EntityEffect
+{
+    public abstract void RaiseEvent(EntityUid target, IEntityEffectRaiser raiser, float scale, EntityUid? user);
+
+    [DataField]
+    public EntityCondition[]? Conditions;
+
+    /// <summary>
+    /// If our scale is less than this value, the effect fails.
+    /// </summary>
+    [DataField]
+    public virtual float MinScale { get; private set; }
+
+    /// <summary>
+    /// If true, then it allows the scale multiplier to go above 1.
+    /// </summary>
+    [DataField]
+    public virtual bool Scaling { get; private set; }
+
+    // TODO: This should be an entity condition but guidebook relies on it heavily for formatting...
+    /// <summary>
+    /// Probability of the effect occuring.
+    /// </summary>
+    [DataField]
+    public float Probability = 1.0f;
+
+    public virtual string? EntityEffectGuidebookText(IPrototypeManager prototype, IEntitySystemManager entSys) => null;
+
+    /// <summary>
+    /// If this effect is logged, how important is the log?
+    /// </summary>
+    [ViewVariables]
+    public virtual LogImpact? Impact => null;
+
+    [ViewVariables]
+    public virtual LogType LogType => LogType.EntityEffect;
+}
+
+/// <summary>
+/// Used to store an <see cref="EntityEffect"/> so it can be raised without losing the type of the condition.
+/// </summary>
+/// <typeparam name="T">The Condition wer are raising.</typeparam>
+public abstract partial class EntityEffectBase<T> : EntityEffect where T : EntityEffectBase<T>
+{
+    public override void RaiseEvent(EntityUid target, IEntityEffectRaiser raiser, float scale, EntityUid? user)
+    {
+        if (this is not T type)
+            return;
+
+        raiser.RaiseEffectEvent(target, type, scale, user);
+    }
+}